47681388 has 36 divisors (see below), whose sum is σ = 121488640. Its totient is φ = 15767136.

The previous prime is 47681363. The next prime is 47681437. The reversal of 47681388 is 88318674.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 643 + ... + 9786.

Almost surely, 2^47681388 is an apocalyptic number.

It is an amenable number.

47681388 is an abundant number, since it is smaller than the sum of its proper divisors (73807252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47681388 is a wasteful number, since it uses less digits than its factorization.

47681388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10566 (or 10561 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 47681388 is about 6905.1711057728. The cubic root of 47681388 is about 362.6182266769.

The spelling of 47681388 in words is "forty-seven million, six hundred eighty-one thousand, three hundred eighty-eight".